Silencing device for corrosion prevention and steam exhaust of main steam pipeline

By installing baffles, heat exchange tubes, and damping components in the steam pipeline, waste heat from the steam is recovered and converted into kinetic energy, solving the problem of insufficient cooling capacity of the steam silencer and achieving the effects of cooling, noise reduction, and energy utilization.

CN223814467UActive Publication Date: 2026-01-20SHAANXI COAL & CHEM IND GRP SHENMU ENERGY DEVELOPME
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Patent Information

Application Number
CN202520956329.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-15
Publication Date
2026-01-20
Estimated Expiration
2035-05-15

AI Technical Summary

Technical Problem

Existing steam silencers have poor cooling capacity, which causes steam to expand and generate noise due to high temperature and pressure, and also results in serious waste of heat energy.

Method used

Design a silencing device for corrosion protection and steam exhaust of main steam pipeline, comprising a partition tube, a heat exchange tube and a damping component. The device recovers waste heat from the steam through the inner and outer walls and the heat exchange tube, and uses the impeller to convert kinetic energy and the damping component to reduce the rotation speed, thereby achieving cooling and noise reduction.

Benefits of technology

It effectively reduces steam temperature and pressure, reduces noise generation, recovers steam heat energy, and avoids energy waste.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of silencing devices, in particular to a silencing device for corrosion prevention and steam exhaust of a main steam pipeline, which comprises interlayer pipes, a heat exchange pipe and a damping assembly, an inner layer wall is arranged on the outer side of the interlayer pipe on the outermost layer, the heat exchange pipe is arranged on the inner side of the inner layer wall, and an outer layer wall is arranged on the outer side of the inner layer wall. A partition plate is arranged in the space between the inner layer wall and the outer layer wall, an impeller is arranged above the interlayer pipe, and damping assemblies are arranged on the inner side and the outer side of the impeller. The inner layer wall, the outer layer wall and the heat exchange pipe are arranged, a channel for water to flow is formed in the interlayer pipe, waste heat of steam is recycled, meanwhile, the temperature of the steam is reduced, air pressure is reduced, the impeller is further arranged at the steam outlet above the interlayer pipe, the impeller can be pushed to rotate when the steam is sprayed out at a high speed, and the steam is sprayed out at a high speed. Kinetic energy of steam is converted into kinetic energy of the impeller, so that noise generated by vibration of the steam and air is reduced, and the damping assembly is used for reducing the rotating speed of the impeller.
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Description

TECHNICAL FIELD

[0001] The utility model relates to a sound elimination device technical field, especially a kind of main steam pipeline anticorrosive exhaust steam's sound elimination device. BACKGROUND

[0002] High-temperature and high-pressure steam turbine generator unit is used to produce high-temperature and high-pressure steam, and the steam will change from high pressure to atmospheric pressure when being discharged, which makes the speed of steam increase sharply, and thus collides with air to produce huge noise. Therefore, a muffler needs to be installed at the end of the discharge.

[0003] The steam muffler is a muffler developed for steam discharge. The muffler is mainly based on the "small hole injection" theory combined with the sound elimination principle of impedance expansion and sound absorption. The boiler steam discharge generally has high flow rate and high airflow noise. The airflow needs to be expanded through a through hole first. The steam after passing through the through hole multiple times is reduced in pressure and flow rate in the resistance expansion chamber. The airflow is then injected through a small hole. The sound power of each octave band after injection has been reduced.

[0004] The steam muffler has poor steam cooling capacity. High temperature is an important factor for steam to have high pressure. If the temperature does not decrease, the steam will still have high air pressure due to thermal expansion, resulting in poor noise reduction and sound elimination effect. Direct discharge of the huge heat energy contained in the steam also wastes energy. INVENTION CONTENTS

[0005] In order to overcome the problem that most steam mufflers have poor steam cooling capacity. High temperature is an important factor for steam to have high pressure. If the temperature does not decrease, the steam will still have high air pressure due to thermal expansion, resulting in poor noise reduction and sound elimination effect. Direct discharge of the huge heat energy contained in the steam also wastes energy.

[0006] The technical scheme of the utility model is as follows: a sound elimination device for main steam pipeline anticorrosive exhaust steam, comprising a partition pipe, a heat exchange pipe and a damping assembly. The partition pipe is provided with three layers and has holes. The holes of adjacent two groups of partition pipes are staggered. The bottom of the innermost partition pipe is provided with a steam inlet pipe. The diameter of the steam inlet pipe is smaller than that of the innermost partition pipe. The outer side of the outermost partition pipe is provided with an inner wall. The inner side of the inner wall is provided with a heat exchange pipe for collecting waste heat. The outer side of the inner wall is provided with an outer wall. A partition plate for guiding water flow is arranged in the space between the inner wall and the outer wall. Four groups of partition plates are arranged at equal intervals on the circumference, and one of the groups is provided with a water-permeable hole for water flow. The outer side of the outer wall is provided with a first water pipe and a second water pipe. A impeller is arranged above the partition pipe. The inner side and the outer side of the impeller are provided with a damping assembly. An installation frame is arranged above the impeller.

[0007] As a preferred, the heat exchange pipes are perpendicular to each other in the top view, and the heat exchange pipes are staggered in the horizontal view.

[0008] As preferred, the two ends of the heat exchange pipe are located in different spaces separated by the partition plate, and the first water pipe and the second water pipe are connected with the two groups of separated spaces farthest from the partition plate with the water-permeable hole.

[0009] As preferred, the inner side of the impeller is provided with a transmission shaft, the upper end of the transmission shaft is provided with a first gear, and the outer side of the impeller is provided with a first gear ring.

[0010] As preferred, the damping assembly comprises a first damping cavity and a first damping plate, the inner side of the impeller is rotatably connected with the first damping cavity, the inner side of the first damping cavity is provided with the first damping plate, the upper side of the first damping cavity is provided with a first sealing plate, the upper side of the first damping cavity is provided with a second gear ring, the upper side of the first sealing plate is provided with a second gear, and the second gear is meshed with the second gear ring and the first gear.

[0011] As preferred, the damping assembly further comprises a second damping cavity and a second damping plate, the outer side of the impeller is provided with the second damping cavity, the inner side of the second damping cavity is provided with the second damping plate, the upper side of the second damping cavity is provided with a third gear ring, the upper side of the second damping cavity is provided with a second sealing plate, the upper side of the second sealing plate is provided with a third gear, and the third gear is meshed with the third gear ring and the first gear ring.

[0012] As preferred, viscous damping oil is filled in the first damping cavity and the second damping cavity, the upper and lower sides of the second gear are rotatably connected with the first sealing plate and the mounting frame respectively, the first sealing plate is hung at the bottom of the second gear, and the upper and lower sides of the third gear are rotatably connected with the second sealing plate and the mounting frame respectively, and the second sealing plate is hung at the bottom of the third gear.

[0013] The utility model discloses the beneficial effect that:

[0014] By setting the inner layer wall, the outer layer wall and the heat exchange pipe, a channel for water circulation is formed in the partition pipe, the waste heat of steam is recycled, the temperature of steam is reduced to reduce the air pressure, the impeller is arranged at the steam outlet above the partition pipe, the high-speed steam can push the impeller to rotate, the kinetic energy of steam is converted into the kinetic energy of the impeller, the noise generated by the vibration of steam and air is reduced, and the damping assembly is used to reduce the rotating speed of the impeller. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The utility model discloses the beneficial effect that:

[0016] Figure 2 The utility model discloses the beneficial effect that:

[0017] Figure 3 The utility model discloses the beneficial effect that:

[0018] Figure 4 The damping assembly is shown in the three-dimensional structure schematic view of the utility model.

[0019] Figure 5 The damping assembly is shown in the three-dimensional structure schematic view of the utility model.

[0020] Explanation of reference numerals: 1, partition pipe; 101, steam inlet pipe; 201, inner layer wall; 202, outer layer wall; 203, partition plate; 204, water permeable hole; 205, first water pipe; 206, second water pipe; 3, mounting frame; 4, heat exchange pipe; 5, impeller; 501, transmission shaft; 502, first gear; 503, first tooth ring; 6, first damping cavity; 601, first damping plate; 602, first sealing plate; 603, second tooth ring; 604, second gear; 7, second damping cavity; 701, second damping plate; 702, second sealing plate; 703, third tooth ring; 704, third gear. DETAILED DESCRIPTION

[0021] The utility model is further explained in connection with the drawings and examples.

[0022] Please refer to Figures 1-5 The utility model provides a kind of example: a kind of main steam pipeline anticorrosion steam exhaust silencer, including partition pipe 1, heat exchange pipe 4 and damping assembly, partition pipe 1 is provided with three layers and is opened with hole, the hole of adjacent two groups partition pipe 1 is staggered with each other, the bottom of innermost layer partition pipe 1 is provided with steam inlet pipe 101, the diameter of steam inlet pipe 101 is less than the diameter of innermost layer partition pipe 1, the outside of outermost layer partition pipe 1 is provided with inner layer wall 201, the inside of inner layer wall 201 is provided with heat exchange pipe 4 for collecting waste heat, the outside of inner layer wall 201 is provided with outer layer wall 202, space between inner layer wall 201 and outer layer wall 202 is provided with partition plate 203 for guiding water flow, partition plate 203 is provided with four groups at equal intervals and one of them is opened with water permeable hole 204 for making water flow, the outside of outer layer wall 202 is provided with first water pipe 205 and second water pipe 206, the above of partition pipe 1 is provided with impeller 5, the inside and outside of impeller 5 are provided with damping assembly, the above of impeller 5 is provided with mounting frame 3;By being provided with inner layer wall 201, outer layer wall 202 and heat exchange pipe 4, a passage for water flow is formed in partition pipe 1, the waste heat of steam is recycled, steam temperature is reduced simultaneously to reduce air pressure, impeller 5 is also set on the above of partition pipe 1 steam outlet, steam is pushed to rotate impeller 5 when high-speed ejection, the kinetic energy of steam is converted into the kinetic energy of impeller 5, so as to reduce the noise generated by steam and air vibration, damping assembly is used to reduce the rotating speed of impeller 5.

[0023] Please refer to Figure 3 AndFigure 4 In the embodiment, the inner side of the impeller 5 is provided with a transmission shaft 501, the upper end of the transmission shaft 501 is provided with a first gear 502, the outer side of the impeller 5 is provided with a first tooth ring 503 above, the damping assembly comprises a first damping cavity 6 and a first damping plate 601, the inner side of the impeller 5 is rotationally connected and provided with the first damping cavity 6, the inner side of the first damping cavity 6 is provided with the first damping plate 601, the upper side of the first damping cavity 6 is provided with a first sealing plate 602, the upper side of the first damping cavity 6 is provided with a second tooth ring 603, the upper side of the first sealing plate 602 is provided with a second gear 604, the second gear 604 is in meshing with the second tooth ring 603 and the first gear 502; after the impeller 5 is pushed by steam, the transmission shaft 501 and the first gear 502 are driven to rotate, the second gear 604 is driven to rotate by transmission, so that the first damping cavity 6 and the first damping plate 601 are rotated, the viscosity of the damping oil in the first damping cavity 6 is used to hinder the rotation of the first damping plate 601, so as to generate resistance to the rotation of the impeller 5.

[0024] Please refer to Figure 3 and Figure 5 In the embodiment, the damping assembly further comprises a second damping cavity 7 and a second damping plate 701, the outer side of the impeller 5 is provided with the second damping cavity 7, the inner side of the second damping cavity 7 is provided with the second damping plate 701, the upper side of the second damping cavity 7 is provided with a third tooth ring 703, the upper side of the second damping cavity 7 is provided with a second sealing plate 702, the upper side of the second sealing plate 702 is provided with a third gear 704, the third gear 704 is in meshing with the third tooth ring 703 and the first tooth ring 503; after the impeller 5 is pushed by steam, the first tooth ring 503 rotates with the impeller 5 and drives the third tooth ring 703 to rotate by the third gear 704, so that the second damping cavity 7 and the second damping plate 701 are rotated, the viscosity of the damping oil in the second damping cavity 7 is used to hinder the rotation of the second damping plate 701, so as to generate resistance to the rotation of the impeller 5.

[0025] In use, steam enters the innermost layer pipe 1 from the steam inlet pipe 101, and is gradually diffused and decompressed from the holes in the layer pipe 1. In this process, water enters the outer wall 202 from the first water pipe 205 or the second water pipe 206, and flows in the outer wall 202 and the layer pipe 1 in the order of layer-heat exchange pipe 4-layer-permeable hole 204-layer-heat exchange pipe 4 under the separation and guidance of the partition plate 203, to exchange heat with the steam and further reduce the pressure of the steam. Then the steam flows from the space between the inner wall 201 and the outermost layer pipe 1 to the impeller 5. The impeller 5 is driven by the steam, which in turn drives the transmission shaft 501 and the first gear 502 to rotate. The second gear 604 is used to drive the second damping ring 603 to rotate, so that the first damping chamber 6 and the first damping plate 601 rotate. The viscosity of the damping oil in the first damping chamber 6 hinders the rotation of the first damping plate 601. At the same time, the first gear ring 503 rotates with the impeller 5 and drives the third gear ring 703 to rotate through the third gear 704, so that the second damping chamber 7 and the second damping plate 701 rotate. The viscosity of the damping oil in the second damping chamber 7 hinders the rotation of the second damping plate 701, thereby generating resistance to the rotation of the impeller 5, reducing the ejection speed of the steam at the discharge port, and further reducing the noise.

[0026] Through the above steps, by setting the inner wall 201, the outer wall 202 and the heat exchange pipe 4, a water flow channel is formed in the layer pipe 1 to recover the waste heat of the steam and reduce the temperature and pressure of the steam. The impeller 5 is also provided above the steam outlet of the layer pipe 1. When the steam is ejected at high speed, it will drive the impeller 5 to rotate, converting the kinetic energy of the steam into the kinetic energy of the impeller 5, thereby reducing the noise generated by the vibration of the steam and air. The damping assembly is used to reduce the speed of the impeller 5.

Claims

1. A sound attenuation device for the anti-corrosion exhaust of a main steam pipe, comprising a partitioned pipe (1); characterized in that: The heat exchange pipe (4) and the damping assembly are further included, the partition pipe (1) is provided with three layers and is provided with holes, the holes of the adjacent two groups of partition pipes (1) are staggered with each other, the bottom of the innermost partition pipe (1) is provided with an inlet pipe (101), the diameter of the inlet pipe (101) is smaller than that of the innermost partition pipe (1), the outer side of the outermost partition pipe (1) is provided with an inner wall (201), the inner side of the inner wall (201) is provided with the heat exchange pipe (4) for collecting waste heat, the outer side of the inner wall (201) is provided with an outer wall (202), the space between the inner wall (201) and the outer wall (202) is provided with a partition plate (203) for guiding water flow, the partition plate (203) is circumferentially provided with four groups of partition plates and one of the groups of partition plates (203) is provided with a water-permeable hole (204) for allowing water flow, the outer side of the outer wall (202) is provided with a first water pipe (205) and a second water pipe (206), the upper side of the partition pipe (1) is provided with an impeller (5), the inner side and the outer side of the impeller (5) are provided with the damping assembly, and the upper side of the impeller (5) is provided with a mounting frame (3).

2. A device according to claim 1, characterised in that: The heat exchange pipes (4) are perpendicular to each other in the top view, and the heat exchange pipes (4) are staggered with each other in the horizontal view.

3. A device for silencing the exhaust steam of a main steam line according to claim 1, characterized in that: The two ends of the heat exchange pipe (4) are located in different spaces formed by the partition plate (203), and the first water pipe (205) and the second water pipe (206) are connected with the two groups of spaces farthest from the partition plate (203) with the water-permeable hole (204).

4. A device according to claim 1, characterised in that: The inner side of the impeller (5) is provided with a transmission shaft (501), the upper end of the transmission shaft (501) is provided with a first gear (502), and the outer side of the impeller (5) is provided with a first gear ring (503).

5. A device according to claim 4, characterised in that: The damping assembly includes a first damping cavity (6) and a first damping plate (601), the inner side of the impeller (5) is rotatably connected with the first damping cavity (6), the inner side of the first damping cavity (6) is provided with the first damping plate (601), the upper side of the first damping cavity (6) is provided with a first sealing plate (602), the upper side of the first damping cavity (6) is provided with a second gear ring (603), the upper side of the first sealing plate (602) is provided with a second gear (604), and the second gear (604) is meshed with the second gear ring (603) and the first gear (502).

6. A device according to claim 1, characterised in that: The damping assembly further includes a second damping cavity (7) and a second damping plate (701), the outer side of the impeller (5) is provided with the second damping cavity (7), the inner side of the second damping cavity (7) is provided with the second damping plate (701), the upper side of the second damping cavity (7) is provided with a third gear ring (703), the upper side of the second damping cavity (7) is provided with a second sealing plate (702), the upper side of the second sealing plate (702) is provided with a third gear (704), and the third gear (704) is meshed with the third gear ring (703) and the first gear ring (503).

7. A device according to claim 6, characterised in that: The first damping cavity (6) and the second damping cavity (7) are filled with viscous damping oil, the upper and lower sides of the second gear (604) are rotatably connected with the first sealing plate (602) and the mounting frame (3) respectively, the first sealing plate (602) is hung at the bottom of the second gear (604), the upper and lower sides of the third gear (704) are rotatably connected with the second sealing plate (702) and the mounting frame (3) respectively, and the second sealing plate (702) is hung at the bottom of the third gear (704).